Nintendo Dragged Down by Sluggish Wii Sales

By

Daisuke Wakabayashi

October 28, 2011

TOKYO—Nintendo Co. sank deeper into the red in the first six months of this fiscal year and forecast its first annual loss in at least three decades, weighed down by sluggish sales of its Wii home console and valuation losses on its foreign-currency holdings.

The sharp earnings downturn is the latest problem facing the Japanese videogame maker, which is struggling to keep pace with a technological sea change that threatens to alter...